Today, when you order "The Shadow Principle", you'll instantly be emailed a Penguin Magic gift certificate. You can spend it on anything you like at Penguin, just like cash. Just complete your order as normal, and within seconds you'll get an email with your gift certificate.

The Shadow Principle booklet offers additional handling methods and presentations for Die-Cipher II. There is also an explanation of the Shadow Principle...discerning the number by simply looking at the brass canister! Also included are a number of special "eye cards." A mystical, blue eye printed on quality business card stock. This provides a consistent surface for shadow reading. Some of the cards have the numbers 1-6 printed on their backs for a nail-writer prediction.